104 Error on Logging In

So I have no idea why and im probably missing something retardedly obvious but I can log into my Battle.net account with my email and password and authenticator fine but using the exact same info to log into the game gives me battle.net error #104 saying my information is incorrect?

In case anyone was not already aware - we do offer live web chat with our representatives during our normal phone hours across our various regional support centers. You can get in contact with us to address any issues with the authenticator even if you can't log into the account. As ever, if you have any general questions - please feel free to let me know! I'm always happy to respond

In case anyone was not already aware - we do offer live web chat with our representatives during our normal phone hours across our various regional support centers. You can get in contact with us to address any issues with the authenticator even if you can't log into the account. As ever, if you have any general questions - please feel free to let me know! I'm always happy to respond